Enhancing GPU performance by up to 10% in 3DMark can be achieved by Nvidia GPU users through a default-disabled setting called Resizable Bar, as revealed by Profile Inspector.
Jimmy from JayzTwoCents stumbled upon a cheeky trick while sorting out some performance issues on his fuckin' beastly rig – an overclocked monster powered by a Core i9-14900KS and an RTX 5090. He was struggling with poor performance in 3DMark Port Royal, leaving him way behind his GPU test rig with a Ryzen 7 9800X3D. After a chat with extreme overclocker Splave, it came to light that Intel-based CPU fanatics like himself were manually firing up ReBAR with Nvidia Profile Inspector for 3DMark. Just flipping the ReBAR switch provided his rig with a 3,304-point boost, starting at 37,105 points and ending up at a robust 40,409 points.
Resizable BAR, or ReBAR for short, was the rage in 2020 when AMD introduced it to its Ryzen 5000 CPUs and RX 6000 series GPUs, calling it Smart Access Memory (SAM). The technology was first unveiled in 2006, but it wasn't until 2020 that hardware manufacturers finally cottoned on to its benefits for gaming. ReBAR alters the amount of data that zips between the GPU and CPU, sidestepping the usual 256MB "aperture" limitation.
Despite its sweet benefits, ReBAR ain't perfect. It doesn't enhance every game, and in some cases, it even brings the game down. To avoidawkward situations, GPU manufacturers like Nvidia run tests on a game-by-game basis and activate ReBAR only in their GPU drivers if a game responds well to the feature. However, keen-eyed enthusiasts have discovered that Nvidia hasn't whitelisted every single game/application that responds well to ReBAR. Manually testin' ReBAR in games that Nvidia hasn't whitelisted yet can lead to significant performance enhancements, usually through Nvidia Profile Inspector, a powerful badass app that gives complete control over Nvidia's drivers. ReBAR can be switched on globally or set on a per-game basis with this app.
In the video[2], JayzTwoCents shows a jaw-dropping 10% performance improvement in 3DMark Port Royal by just enabling ReBAR. Community members also reported that CPU-bound games and VRAM-intensive systems, such as DCS World, see substantial FPS increases from manual ReBAR activation, even when the GPU driver doesn't automatically support it[1][3]. Some even saw benefits in titles like The Elder Scrolls IV: Oblivion[4].
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[1] https://forums.tomshardware.com/threads/resizable-bar-mbam-enablement.3666970/[2] https://www.youtube.com/watch?v=T3UW-dbQx7E[3] https://www.youtube.com/watch?v=v4jjXDrjQ_s[4] https://forum-en.revision3.com/t/how-to-enable-resizable-bar-mbam/859091/40[5] https://www.techpowerup.com/vgabios/232180/cypress-cmem-and-resizable-bar-support-for-nvidia-geforce-gtx-1650-super-and-gtx-1660-super-graphics-cards[6] https://www.google.com/news/health[7] https://www.tomshardware.com/news/tom-s-hardware-newsletter,3984.html
Smartphone users might find it surprising that Resizable BAR (ReBAR), a technology that boosts performance in certain games by allowing more data to flow between the GPU and CPU, wasn't fully embraced by hardware manufacturers until 2020, when it was initially released by AMD. Jimmy from JayzTwoCents, an enthusiast known for his overclocked PC setup, discovered that enabling ReBAR via Nvidia Profile Inspector in games not yet whitelisted by Nvidia can lead to significant performance improvements, such as a 10% boost in 3DMark Port Royal.
